KR101908129B1 - Anti-static Al sheet - Google Patents

Abstract

The present invention relates to an Al base sheet; And an antistatic foam interposer formed on at least one side of the Al base sheet; In the case of using the anti-static Al laminator, there is no problem such as denaturation, breakage and dust of physical properties due to light leakage phenomenon, and transportation and operation of the display module are further facilitated.

Description

Anti-static Al sheet}

The present invention relates to an anti-static Al interlayer having both a buffering effect and a water-blocking effect, wherein the display module in a foamed foam box (EPS, EPP) for laminate display (LCD, LED, OLED) To an antistatic Al interlayer capable of minimizing the cause of surface scratches, breakage, and particularly light leakage.

Thin-film displays such as plasma display panels, thin-film transistor liquid crystal displays (TFT-LCDs), and organic EL (OLEDs), which are excellent in various display capabilities such as display capacity, luminance, contrast, afterimage and viewing angle, It is a trend to rapidly advance into business. In addition, as the display becomes larger, the glass substrate used as a substrate material of a flat panel display panel such as a liquid crystal monitor panel or a plasma display panel is also becoming larger. Accordingly, in order to load and transport the glass for display, the glass is vertically stacked in a packaging box composed of a frame such as a storage portion and a cover having corrugated grooves as thick as the glass, Loading.

In the case of a vertically stacked type packaging box, it is necessary to provide a corrugated groove of the thickness of the glass substrate in the box so that the glass can be stacked in the vertical direction, and there is a limit to the number of glass sheets that can be stacked. In addition, it is difficult to mold the corrugated grooves in the packaging box with a current styrofoam mold to a thickness of 10 mm or less. On the other hand, according to the trend of slimmer communication devices, the thickness of the glass substrate is made slimmer, There is a falling problem. Therefore, it is advantageous to load a plurality of glasses in a horizontal direction rather than in a vertical direction according to the trend of enlargement and thinning of the glass. However, in the case of horizontal loading, there is a possibility that physical properties are changed and damaged by small shocks and static electricity during transportation and storage. In order to solve this problem, we tried to prevent breakage of glass and change of properties by inserting laminated support between glass substrates. However, plastic such as EPP and EPS which have been conventionally used as a laminated support has a property of accumulating static electricity generated by friction with other materials for a long time due to its electrical insulating property as its own property, There is a problem that the image defect rate increases. Accordingly, although a laminated support exhibiting charging performance by using carbon black, a surfactant, or a metal oxide as an internal type was used, the surface resistance (10E5? / Sq.) Is excellent when carbon black or metal oxide is used, And the like. In addition, it is very sensitive to changes in temperature and humidity, resulting in a problem that causes light leakage.

In order to solve the above problems,

(LCD, LED, OLED) module in the process of packaging and transportation of display module, and a display module in EPS / EPP for stacking transportation Which can minimize the cause of surface scratches, breakage, particularly light leakage, by protecting and blocking the surface of the aluminum foil.

According to an aspect of the present invention, And an antistatic foam interposer formed on at least one side of the Al base sheet; The present invention relates to an anti-static Al foil.

In the case of using the antistatic Al laminates of the present invention, there is no problem such as denaturation, breakage or dust of physical properties due to the light leakage phenomenon, and transportation and operation of the display module are further facilitated.

In addition, the antistatic Al interlayer of the present invention has excellent moisture shielding effect and antistatic effect by being used on at least one side of the Al base sheet, and the manufacturing process is simple and the cost is saved .

1 shows an anti-static Al interleaver for a display module according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

Referring to Fig. 1, the present invention relates to an Al base sheet 10; And an antistatic foam interlayer (20) formed on at least one side of the Al base sheet (10); The present invention also provides an anti-static Al interleaver comprising:

In the present invention, the antistatic foam interlayer 20 is composed of multiple layers in which an antistatic film 30 having excellent charging performance, a foam foam 40 and an antistatic film 50 are successively laminated.

In the present invention, in order to protect the display module from internal and external impacts and moisture, the antistatic Al Aluminum foil is formed by laying in an EPS box, In order to prevent external impact and scratches, three layers of foam sheets are laminated again, and at least one surface of the Al base sheet, which is a simple structure, By simplifying the structure itself, we can maximize the competitiveness of raw material prices.

Therefore, the anti-static Al liner protects and blocks the display module in the foamed foam box (EPS, EPP) for stacking display (LCD, LED, OLED) modules from internal and external impacts and moisture to prevent surface scratches, The cause of the light leakage phenomenon can be minimized.

According to one embodiment of the present invention, the Al base sheet may be formed of an Al foil film sheet, an Al vapor deposited film sheet, or a non-vapor deposited film sheet having excellent water shielding efficiency, and an Al foil is preferable.

According to an embodiment of the present invention, the antistatic foam sheet may have a multilayer structure in which an antistatic film having excellent charging performance is laminated on at least one side of the foam foam.

According to an embodiment of the present invention, the antistatic film is preferably a polyethylene film, and the polyethylene film may be a high density polyethylene (HDPE), a low density polyethylene (LDPE), a linear low density polyethylene (LLDPE) and a medium density polyethylene (MDPE) And the like.

According to an embodiment of the present invention, the foamed foam may be formed as a foamed foam for foamed gauze, and a foam made by low-foaming, high-foaming, or chemical crosslinking.

More specifically, the present invention relates to a polyolefin-based foam sheet produced by non-crosslinking or chemical crosslinking; Polyurethane foam sheet; Or an ethylene vinyl acetate (EVA) foam sheet made by pressurized crosslinking; however, the present invention is not limited thereto.

According to one embodiment of the present invention, the antistatic film is laminated on at least one surface of the foamed foam. The antistatic film may be antistatic, including a coating layer coated with an antistatic coating composition containing an antistatic composition or an antistatic agent. As a result, the antistatic effect is excellent, and the heat resistance and weather resistance are excellent.

Wherein the antistatic coating composition comprises 0.1 to 30% by weight of at least one selected from the group consisting of conductive polymers, graphene and carbon nanotubes; 2 to 35% by weight of a thermosetting binder; 10 to 40% by weight of water; 20 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer.

Alternatively, the antistatic coating composition may contain 0.1 to 30% by weight of at least one selected from among a conductive polymer, a graphene, and a carbon nanotube; 5 to 40% by weight of a photocurable binder; 0.1 to 5% by weight of a photoinitiator; From 40 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer.

Examples of the conductive polymer include organic electroconductive polymers having a copolymer, in particular, polyaniline, polypyrrole, polyethylene dioxythiophene (PEDOT), and polythiophene series. Preferably, the conductive polymer is an organic conductive polymer having a resonance structure such as polyaniline, polypyrrole, or polythiophene (PEDOT).

The carbon nanotube is a tube-shaped molecule formed by rounding a graphite plate composed of six hexagonal rings connected to each other. The carbon nanotubes are excellent in rigidity and electrical conductivity, so that the film hardness is increased and the antistatic function is improved. In addition, since it is not decomposed when exposed to ultraviolet rays or heat, the weatherability is increased as compared with the case of using a conductive polymer or the like.

The carbon nanotubes preferably have a length of 1 to 60 탆 and a diameter of 0.1 to 50 nm. Within this range, transparency or dispersibility is excellent.

In the present invention, the thermosetting binder may be selected from the group consisting of a urethane resin, an acrylic resin, a urethane-acrylic copolymer, a polyimide, a polyamide, a polyether resin, a polyolefin resin and a melamine resin, But is not limited thereto.

Specific examples of the organic solvent include dimethylsulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), 2-butanone, May be selected from the group consisting of alcohols, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol and ethylene glycol or a mixture thereof, preferably methyl alcohol, ethyl alcohol, isopropyl alcohol, Butanol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol, or ethylene glycol, but is not limited thereto.

The photocurable binder may be selected from the group consisting of pentaerythritol triacrylate (PETA), dipentaerythritol pentaacrylate (DPPA), dipentaerythritol hexaacrylate (DPHA), trimethylolpropane triacrylate (TMPTA), etc. Or as a curable bonding precursor, aliphatic urethane acrylate oligomers having 3 to 15 functionalities, but are not limited thereto.

The additives included in the thermosetting electrification composition or the photocurable electrification composition may preferably be selected from the group consisting of fluorine-based, silicone-based, cationic, anionic, or zwitterionic surfactants, or a mixture thereof. The additive can improve the flowability, antifouling property, dispersibility and leveling property when the conductive polymer composition is coated.

The anti-blocking agent may be a polyether siloxane copolymer, an organo-modified polysiloxane, a polyether-modified polydimethylsiloxane, a methacryloxy functional silicone, , Siliconic glycol with carbinol functionality, alkylmethylsiloxane, silicone glycol, or derivatives or copolymers thereof, which may be in the form of an aqueous or oily silicone additive .

The ultraviolet stabilizer improves the weatherability of the antistatic product and reduces the yellowing caused by ultraviolet rays. The ultraviolet stabilizer may include a benzophenol-based or benzotriazole-based stabilizer.

More specifically, the thermosetting antistatic composition is coated on one side of the polyolefin film at a thickness of 0.1 to 10 탆 by a method such as gravure, offset, kiss bar, knife, Meyer bar, After the coating, the antistatic layer can be formed by curing at 50 to 250 ° C for 30 seconds to 30 minutes to crosslink.

Alternatively, the photocurable antistatic composition may be coated on one surface of the olefin-based film to a thickness of 0.1 to 10 μm using gravure, offset, kiss bar, knife, Meyer bar, magic, roll or spray method , And dried at a temperature of 50 to 250 ° C. for 1 to 10 minutes to completely remove the organic solvent in the composition, and then irradiated with ultraviolet light having a light quantity of 250 to 600 mJ / cm 3 to cure the antistatic layer.

According to an embodiment of the present invention, the antistatic film may be formed by mixing the anti-static antistatic composition with the polymer resin in an amount of 0.1 to 40% by weight. If the anti-static antistatic composition is mixed in an amount of less than 0.1% by weight, the antistatic effect is insufficient and it may be difficult to achieve the object of the present invention. If the antistatic composition is mixed in an amount exceeding 40% by weight, the physical properties of the synthetic resin may be affected .

The polymer resin may be mixed with an anti-static antistatic composition, and may be a polyolefin series such as polyethylene or polypropylene, a nylon series, a polyamide series, a polyester series, a polyimide series, a polystyrene series, an EVA series, ≪ / RTI > or mixtures thereof.

The anti-static antistatic composition comprises 0.1 to 40% by weight of at least one selected from graphene, carbon nanotube and carbon nanotube; 0.1 to 5% by weight of an additive selected from the group consisting of a heat stabilizer, a plasticizer, a UV stabilizer and a dispersant, or a mixture thereof, and 55 to 99.8% by weight of a polymer resin as a base material.

When the graphene or carbon nanotube is contained in an amount of less than 0.1% by weight, the surface resistance of the antistatic product may increase, and the effect of improving weatherability may be insignificant. If the grafting agent and the carbon nanotube are contained in an amount exceeding 40% by weight, And when added to a polymer resin, the physical properties of the polymer resin can be lowered.

The additive includes at least one selected from the group consisting of heat stabilizers, plasticizers, ultraviolet stabilizers and dispersants.

The additive may be included in an amount of 0.1 to 5% by weight based on the anti-static antistatic composition. If it is contained in an amount of less than 0.1% by weight, the effect due to the addition of the additive is insignificant, and if it is more than 5% by weight, the properties of the antistatic film such as rigidity may be deteriorated.

The polymer resin may be at least one selected from the group consisting of polyolefin resins, polyesters (trichlorosilane of PET A, PET G, PET G-PET A-PET G), polystyrene, polyimide, polyamide (nylon), polysulfonate, polycarbonate, , Polyvinyl acetal, polymethyl methacrylate, polyvinyl chloride, polyethylene, polypropylene, modified polyphenylene oxide, SBS, SAN, synthetic rubber, phenol resin, epoxy resin, acrylic resin, urethane resin, Blends or copolymers, or a mixture thereof.

And may further include a compatibilizer in the mixing process. The compatibilizing agent serves to increase the mixing property of the anti-static antistatic composition and the polymer resin. Examples of the compatibilizing agent include an olefin-based polymer, an ethylene-propylene block copolymer, a maleic acid grafted or copolymerized polystyrene, an acrylic group-containing polymer (polymethyl methacrylate, poly (styrene- Styrene-butylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, maleic acid-grafted styrene- Styrene-3 copolymer, or a mixture thereof. The compatibilizing agent may be included in an amount of 0.1 to 5% by weight based on the polymer resin. If it is contained in an amount of less than 0.1% by weight, compatibility is reduced, and if it is contained in an amount exceeding 5% by weight, the surface resistance of the antistatic product increases.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. This is for the purpose of illustrating the present invention, and thus the scope of the present invention is not limited thereto.

< Manufacturing example  1> Film manufacturing

The extruded HDPE film was corona treated at a temperature of 100 to 200 ° C using a blowing PE extruder.

PREPARATION EXAMPLE 2 &gt; Preparation of Inner-type Antistatic Film

An HDPE film containing 2 to 5% by weight of carbon nanotubes with an electrification agent was produced at a temperature of 100 to 200 ° C using a blowing PE extruder.

&Lt; Preparation of antistatic coating composition >

< Manufacturing example  3> Preparation of thermosetting antistatic coating composition

5 wt% of conductive polymer (PEDOT, Agfa), 5 wt% of acryl-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), water 29 wt%, isopropyl alcohol 50 wt%, slip agent 0.5 wt% And 0.5% by weight of an antistatic coating composition were mixed to prepare a thermosetting antistatic coating composition.

< Manufacturing example  4> Preparation of thermosetting antistatic coating composition

2 wt% of carbon nanotubes (multilayer carbon nanotubes, nanohub), 5 wt% of acrylic-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), 39.5 wt% of water, 53 wt% of isopropyl alcohol, And 0.5% by weight of silicone (based on silicon) were mixed to prepare a thermosetting antistatic coating composition.

< Manufacturing example  5> Preparation of photocurable antistatic coating composition

10 wt% of an acrylic monomer (Dipentaerythritol hexaacrylate), 15 wt% of a conductive polymer (PEDOT, Agfa), 1 wt% of a photo initiator (Igacure 184, Ciba Geigy Co.), 0.2 wt% of a slip agent (Tego glide 450, Tego Co.) , 0.5 wt% of an ultraviolet stabilizer (BYK-307, BYK Co.), 0.3 wt% of an ultraviolet absorber (Tinubin 3270, Ciba Geigy Co.), 50 wt% of isopropyl alcohol and 23 wt% of methylcellosolve, An antistatic coating composition was prepared.

< Manufacturing example  6> Preparation of photocurable antistatic coating composition

10 weight% of acrylic monomer (Dipentaerythritol hexaacrylate), 10 weight% of carbon nanotubes (multiwall, nanosil), 1 weight% of photo initiator (Igacure 184, Ciba Geigy Co.), slip agent (Tego glide 450, Tego Co.) 0.5 wt% of ultraviolet light stabilizer (BYK-307, BYK Co.), 0.3 wt% of ultraviolet absorber (Tinubin 3270, Ciba Geigy Co.), 50 wt% of isopropyl alcohol and 28 wt% of methyl cellosolve To prepare a photocurable antistatic coating composition.

< Manufacturing example  7> Production of Antistatic Film

An antistatic HDPE film was prepared by thermally curing the antistatic coating solution prepared in Preparation Examples 3 and 4 on the surface of the HDPE film prepared in Preparation Example 1 by a roll-to-roll method at 60 to 100 ° C.

< Manufacturing example  8> Antistatic film production

The antistatic coating solution prepared in Preparative Examples 5 and 6 was dried at 60 to 100 ° C by the roll-to-roll method on the surface of the HDPE film prepared in Preparation Example 1, and cured by photocuring between 80 to 120 W to obtain antistatic HDPE A film was prepared.

&Lt; Preparation of antistatic foam sheet >

&Lt; Preparation Example 9 > Preparation of coating type antistatic foam sheet

Each antistatic HDPE film prepared in Preparation Examples 7 and 8 was laminated on both sides of 1.0 mm PE non-crosslinked foamed material prepared in a non-crosslinked form to prepare an antistatic foam sheet.

< Manufacturing example  10> Inner shape  Antistatic foam Nifty  Produce

The antistatic antistatic HDPE film prepared in Preparation Example 2 was laminated on both sides of 1.0 mm PE non-crosslinked foamed material prepared in a non-crosslinked form to prepare antistatic foam sheet.

&Lt; Preparation of antistatic Al Alginate &

< Example  1>

An antistatic Al foil was prepared by laminating the antistatic foam sheet prepared in Production Example 9 and the 7 mu m Al foil on one side with dry lamination.

< Example  2>

The anti-static Al foil was prepared by laminating the antistatic foam sheet prepared in Production Example 10 and the 7 mu m Al foil on one side with dry lamination.

< Example  3>

Antistatic Al foil was prepared by laminating the antistatic foam sheet prepared in Production Example 9 on both sides of 7 mu m Al foil using dry lamination to both sides.

< Example  4>

Anti-static Al foil was prepared by laminating the antistatic foam sheet prepared in Preparation Example 10 on both sides of 7 mu m Al foil using dry lamination to both sides.

< Comparative Example  1> Coated type  Manufacture of anti-static foam sheet

The thermosetting antistatic composition prepared in Preparation Example 3 was dried for 1 to 2 minutes at a temperature of 50 to 70 캜 using a micro gravure coating method on the surface of the HDPE film laminated on both sides of the non-crosslinked 1 mm PE foam material by lamination, To form an antistatic layer to prepare an antistatic foam sheet.

< Comparative Example  2> Inner shape  Manufacture of anti-static foam sheet

An antistatic foam sheet was prepared by laminating a HDPE film containing 2 to 5 wt% of carbon nanotubes with an electrification agent on both sides of a 1 mm PE foamed foam material prepared in a non-crosslinked form.

< Experimental Example  1> Measurement of surface resistance

The surface resistivity was measured under the conditions of 55% RH, 23 占 폚, and an applied voltage of 100 to 500 V according to the ASTM D257 measurement method for the antistatic gravels prepared in Examples 1 to 4 and Comparative Examples 1 and 2. The results are shown in Table 1 below.

< Experimental Example  2> Constant temperature / Humidity  Post surface resistance test

The antistatic blank prepared in Examples 1 to 4 and Comparative Examples 1 and 2 was allowed to stand for 72 hours in a constant temperature and humidity bath having a temperature of 70 캜 and a humidity of 90%, and then the surface resistance was measured. The results are shown in Table 1 below.

< Experimental Example  3> Measurement of water permeability

The moisture permeability was measured according to ASTM F1249 using a measuring instrument: Permatran W3 / 33MA (Mocon Co., USA), measurement conditions: 38 ° C, 100 % RH, measurement range: 0.0001 to 500 g / (m2.day). The results are shown in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Surface resistance (Ω / ㎠) 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ Surface resistance after constant temperature / humidity
(Ω / cm 2) 10 ⁷ 10 ⁷ 10 ⁷ 10 ⁷ 10 ⁷ 10 ⁷ Water permeability g / (m ² .day) 0.0001 0.0001 0.0001 0.0001 55 50

As shown in Table 1, the antistatic Al laminates of Examples 1 to 4 of the present invention exhibited the same performance in the surface resistance and the surface resistance after the constant temperature / humidity after the comparison with the foam laminates of Comparative Examples 1 and 2, The antistatic foam of Comparative Examples 1 and 2 was used in which the moisture shielding effect was 0.0001 g / (m ² .day) or less, which is a portion where the module should be protected from light and shock, (M ² .day) of 50 g / (m ² .day).

Therefore, when the antistatic Al alumina of the present invention is used, not only the excellent moisture shielding effect and the antistatic effect are obtained but also the manufacturing process is simple and the cost is also reduced without any curl phenomenon of the Al alumina, It is expected that problems such as denaturation, breakage and dust can be minimized.

10: Al base sheet
20: Antistatic foam diaper
30: Antistatic film
40: foamed foam
50: Antistatic film

Claims (8)

Al base sheet; And
An antistatic foam interposer formed on at least one side of the Al base sheet; In the antistatic Al interlayer,
The Al base sheet is an Al foil film sheet,
The antistatic foam sheet is a multilayer in which an antistatic film, a foamed foam and an antistatic film are sequentially laminated,
Wherein the antistatic film is a polyethylene film and includes a coating layer coated with an antistatic coating composition containing an antistatic agent or an antistatic agent,
The antistatic coating composition is a thermosetting antistatic composition or a photocurable antistatic composition,
0.1 to 30% by weight, based on the total weight of the antistatic coating composition, of at least one antistatic agent selected from the group consisting of conductive polymers, graphene and carbon nanotubes; 2 to 35% by weight of a thermosetting binder or a photocurable binder; 10 to 40% by weight of water; 20 to 75% by weight of an organic solvent; And
0.1 to 5% by weight of at least one additive selected from the group consisting of an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer,
The foamed foam was a 1.0 mm polyolefin foam sheet prepared by non-crosslinking; Polyurethane foam sheet; Or an ethylene vinyl acetate (EVA) foam sheet made by pressure crosslinking; Lt;
Wherein the antistatic Al interlayer has a water permeability of 0.0001 g / (m ² .day).
delete delete delete delete delete The method according to claim 1,
Wherein the polyethylene film is at least one selected from high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and medium density polyethylene (MDPE). delete

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